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Revision as of 01:20, 1 May 2021 by Hallowizer2 (talk | contribs) (Mentioned the IOP name. Source: Wii System Software page on Wikipedia, IOS section)
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The Starbuck is the security coprocessor on the Wii U, much like the Starlet core on the Wii. It runs IOSU, in addition to boot0 and boot1. It is internally known as the IOP, short for Input/Output Processor, although this can lead to confusion with the Starlet.